TradSesUpdateAction (FIX tag 1327)

charFIX 5.0 SP2

TradSesUpdateAction (tag 1327) is a char field defined in FIX 5.0 SP2. It appears in 2 message types, always optionally.

At a glance

Tag
1327
Name
TradSesUpdateAction
Datatype
char
Dialects
FIX 5.0 SP2
Messages
2

What the specification says

Specifies the action taken for the specified trading sessions.

Descriptions are quoted from the FIX Orchestra sources under the Apache 2.0 licence.

A real message using tag 1327

TradingSessionList · FIX 5.0 SP2
TagFieldWire valueMeaning
8BeginStringFIXT.1.1
9BodyLength108
35MsgTypeBJTradingSessionList
49SenderCompIDBOARTEAM
56TargetCompIDCOUNTERPARTY
34MsgSeqNum2
52SendingTime20240101-12:00:00.000
386NoTradingSessions2 entries2repeating group
336TradingSessionID1Day
1327TradSesUpdateAction1
340TradSesStatus0Unknown
336TradingSessionID1Day
1327TradSesUpdateAction1
340TradSesStatus0Unknown
10CheckSum049
Edit and decode it yourself

Shown with | separators for readability. On the wire FIX uses SOH (0x01), an invisible control byte — and because BodyLength and CheckSum are computed over the actual bytes, the two forms have different checksums. Both are valid and both decode here.

Open in the full decoder →

Generated from the FIX 5.0 SP2 dictionary and verified at build time: it parses and validates with no issues. Open the decoder to try your own message.

Where tag 1327 appears

Requiredness is a property of the message, not of the field: the same tag can be optional in one message and conditionally required in another.

MessageMsgTypeRequirednessWhere in the message
TradingSessionListBJOptionalinside the TrdSessLstGrp component
TradingSessionListUpdateReportBSOptionalinside the TrdSessLstGrp component

Wire format

A single character. Most char fields are enumerated, so the value is one of a fixed set rather than arbitrary text. @boarteam/fix keeps the value as a string and, for enumerated fields, reports validate/value-not-in-enum when it is not a defined value.

Read tag 1327 in TypeScript

decode.tsts
import { createFixEngine } from "@boarteam/fix";import { dictionary } from "@boarteam/fix-dict-fix50sp2";const fix = createFixEngine(dictionary);const { message, issues } = fix.parse(raw);const field = message.fields[1327];field?.name;   // "TradSesUpdateAction"field?.raw;    // the verbatim wire stringfield?.value;  // coerced to a string

Other char fields

Decode this in your own code

The same engine that produced the decoded example above is an Apache-2.0 npm package with zero runtime dependencies. It runs in Node and in the browser, and parse() returns problems as data instead of throwing.

npm i @boarteam/fix @boarteam/fix-dict-fix50sp2